Shaftless Screw Conveyor By Se.f.t. S.r.l.

Shaftless Screw Conveyor consist of a rotating screw inside a trough (tubular or U-shaped), having an inlet and an outlet spout, being the rest of the machine completely closed. The absence of the internal shaft allows conveying sticky and entangling material, usually very difficult to handle and conveyed with a shafted screw. The bottom of the trough has an anti-wear protection, in form of HPDE liner or sliding bars, depending on the material to be conveyed (grinding, sludge, etc.)
The configuration of the conveyor can be "push", when the drive is placed immediately before the inlet hopper or can be "draw", when the drive is placed immediately after the outlet hopper. The total length of the conveyor can be easily adapted to the plant lay-out. The inclination varies in the range 0A -30A with a progressive reduction in efficiency: as a general rule the flow rate drops of a 50% at an angle of 30A with respect to the flow rate at 0A ; anyway the actual flow rate depends on both the configuration and the material being conveyed.